Core Lending Platform for a Microfinance Lender in London: 2026 Build Cost

The verdict in three sentences

An FCA-authorised alternative lender in London with 4,200 active loans to sole traders and small businesses cannot scale on a patched loan servicing tool and manual bank statement reviews. A custom core lending platform costs roughly 180,000 to 450,000 GBP in 2026 (market ballpark), against lending-as-a-service platforms billed by subscription plus per-loan fees. The deciding factor is how much of your edge lives in underwriting and Open Banking data: if it is your differentiator, own it; if it is commodity, rent the core and build around it.

What a London lender needs from a core lending platform

Take an illustrative lender in Shoreditch offering 3,000 to 50,000 GBP working capital loans to UK small businesses, with 28 staff and a broker channel. Today it runs a servicing tool chosen at launch, spreadsheets for arrears and manual PDF bank statement checks.

The capabilities that matter:

• Origination: application journeys, broker portal, document upload, e-signature.
• Open Banking affordability: account information access via an FCA-authorised AISP to pull 6 to 12 months of transactions, categorise income and outgoings and feed a decision model.
• Decisioning: rules plus scorecards, with every decision explainable and logged.
• Servicing: schedules, Direct Debit collection, payment holidays, arrears and collections workflows.
• Regulatory evidence: depending on whether loans are regulated credit agreements, the Consumer Credit sourcebook (CONC) and the Consumer Duty shape affordability, forbearance and customer communications. Your compliance team defines the exact obligations; the platform must make them auditable.
• Reporting: arrears by cohort, PAR30 equivalent days past due, funder reporting for your credit facility.

Cost comparison in GBP for 2026

Figures are a 2026 market ballpark. Platform pricing is quote-based, usually a platform fee plus a per-loan or per-account charge, so treat that line as an order of magnitude.

The hybrid route is where a nearshore partner fits. Kolonell's prices for custom applications are 10,670 to 22,870 EUR and up (7,000,000 to 15,000,000 FCFA and up) for a complex application, such as an Open Banking affordability engine or broker portal, and 6,100 to 10,670 EUR (4,000,000 to 7,000,000 FCFA) for a mid-size one like an arrears dashboard. A full regulated core is scoped separately and sits well above those floors.

Pitfalls specific to UK lenders

Migration of live loans is the riskiest step: every schedule, arrears balance and payment arrangement must reconcile to the penny before cutover. Run parallel servicing for at least one full collection cycle. Second, keep decision logic versioned: when the FCA or your funder asks why a loan was approved two years ago, you need the exact rules in force that day. Open Banking consents also expire, so design for reconsent rather than one-off pulls.

Mini case study

Illustrative example: Priya, COO of a 28-person lender in London with a 46 million GBP book. Underwriters spend 50 minutes per application reading bank statements across 900 applications a month, or 750 hours. Open Banking categorisation cuts that to 15 minutes, saving 525 hours a month, roughly 15,750 GBP at 30 GBP an hour, or 189,000 GBP a year. Days past due tracking by broker also lets her drop two underperforming broker channels. A hybrid build at 150,000 GBP pays back in under a year.

FAQ

Should an alternative lender build or buy its core lending platform?

Buy the commodity servicing core if your products are standard, and build the parts that carry your edge, usually decisioning and broker experience. Full custom only makes sense above roughly 10,000 active loans or with unusual products.

How does Open Banking data improve affordability checks?

It replaces manual statement reading with categorised transaction data pulled through an authorised provider. Lenders commonly report review time falling from 45 to 60 minutes to around 15 minutes per file.

What does the FCA expect from lending software?

It expects firms to evidence fair outcomes, sound affordability and appropriate treatment of customers in difficulty, under rules such as CONC and the Consumer Duty where applicable. The software must log decisions and communications so you can show this on request.

How long does a core lending migration take?

Plan 9 to 14 months for a full custom platform and 5 to 8 months for a hybrid. The live loan migration and parallel run alone take 6 to 10 weeks.

Can a nearshore team work on a regulated lending platform?

Yes, provided data access is controlled, test data is anonymised and your outsourcing arrangements are documented. Budget 10 to 15% of the project for security review.

Let's scope your project. Share your book size, products and current stack, and we will price the decisioning, broker portal or servicing pieces you need, with an indicative budget and timeline. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.